Let me share with you some glutathione basics
doi: 10.1016/j.redox.2021.101930 305 ZhangQ.XiangR.HuoS.ZhouY.JiangS.WangQ.et al

Ingredients Water, Butylene Glycol, Glycerin, Methylpropanediol, Niacinamide, Propanediol, 1,2-Hexanediol, Betaine, Carbomer, Hydroxyacetophe- none, Tromethamine, Glycereth-25 PCA Isostearate, Sea Water, Diphenyl Dimethicone, Panthenol, Triethylhexanoin, Ethylhexylglycerin, Xanthan Gum, Adenosine, Disodium EDTA, Fragrance, Hydrogenated Lecithin, Polyglyceryl-10 Oleate, Biosaccharide Gum-1, Glutathione, Hyaluronic Acid, Hydrolyzed Hyaluronic Acid, Sodium DNA, Sodium Hyaluronate, Stellaria Media (Chickweed) Extract, Lactobacillus Ferment, Aloe Barbadensis Leaf Extract, Dioscorea Japonica Root Extract, Hibiscus Esculentus Fruit Extract, Malva Sylvestris (Mallow) Extract, Saccharide Isomerate, Alanine, Glutamic Acid, Glycine, Serine, Threonine, Calendula Officinalis Flower Extract, PCA, Hamamelis Virginiana (Witch Hazel) Leaf Extract, Centella Asiatica Extract, Citric Acid, Sodium Citrate, Ascorbic Acid, Helianthus Annuus (Sunflower) Seed Oil, Tranexamic Acid, Caprylic/Capric Triglyceride, Ceramide NP Content 150 ml / 1.07 fl oz For Topical and Cosmetic Use Only

M.TerronesO.BasanezG.et al (2008)